Interstate 175

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Interstate 175 marker

Interstate 175
South Bay Drive
I-175 highlighted in red
Route information
Auxiliary route of I-75
Maintained by FDOT
Length1.285 mi[1] (2.068 km)
Major junctions
West end I-275 in St. Petersburg
East end SR 594 / SR 687 in St. Petersburg
Highway system
SR 173SR 187
SR 592SR 594I-595

Interstate 175 (I-175) in St. Petersburg, Florida, also known as South Bay Drive, is a 1.3-mile-long spur route from Interstate 275 into downtown St. Petersburg, it is also designated as the unsigned highway State Road 594.[1] There is a sibling segment of freeway nearby designated as I-375.

Route description[edit]

The interstate begins at I-275 with Tropicana Field on the northeast side of the interchange, going east into downtown St. Petersburg, passing through eastbound exits with 9th Street South/8th Street South and 6th Street South before the interstate ends at 5th Avenue South next to an at-grade intersection with 4th Street South. Westbound, the interstate begins with a split from southbound 4th Street South just north of the 4th Street South/5th Avenue South intersection, and has no exits until the interchange with I-275. Along with its sister highway I-375, I-175 lacks exit numbers.[2]


The freeway was originally to have been a part of the former Pinellas Belt Expressway, which would have continued from its western terminus at I-275; the Pinellas Belt Expressway was budgeted in 1974 but was cancelled in the late 1970s due to local opposition.[3] I-175 was built between 1977 and 1980 and opened on April 23, 1980 at a cost of $5.5 million (equivalent to $14.4 million in 2018).[4]

When I-75 was relocated in the late 1970s/early 1980s, five miles (8.0 km) of additional interstate became available; thus, the St. Petersburg feeder sections of I-175 and neighboring I-375 were upgraded to interstate status.[citation needed]

Exit list[edit]

The entire route is in St. Petersburg, Pinellas County. All exits are unnumbered.

0.0000.000 I-275 (SR 93) – Bradenton, TampaWestbound exit and eastbound entrance; western terminus, I-275 exit 22; tri-stack interchange.
0.7851.263 M.L. King Jr. Street South / 8th Street SouthEastbound exit and westbound entrance; access to Bayfront Health St. Petersburg
1.0891.7536th Street SouthEastbound exit and westbound entrance
1.2852.0684th Street SouthEast end of I-175; SR 594 continues one block (eastbound only)
1.372[5]2.208 SR 687 north (3rd Street South) – Downtown St. Petersburg
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also[edit]


  1. ^ a b c "Florida Department of Transportation Interchange Report" (PDF). Florida Department of Transportation. September 29, 2017. p. 7. Retrieved January 22, 2019.
  2. ^ "Florida's Interstate Exit Numbers". Florida Department of Transportation. Retrieved November 18, 2010.
  3. ^ "Pinellas County Highways". Retrieved October 5, 2014.
  4. ^ "I-175 at South-East highways". Retrieved October 5, 2014.
  5. ^ FDOT straight line diagrams Archived March 6, 2014, at the Wayback Machine, accessed March 2014

External links[edit]

Route map:

KML is from Wikidata